informationconnection.java

P2P协议GUNTELLA的java源代码

/*
 * Copyright (C) 2000-2001  Ken McCrary
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Email: [e-mail]
 */
 
package com.kenmccrary.jtella;

import java.net.Socket;
import java.io.IOException;

/**
 *  A <code>InformationConnection</code> is formed in order to provide a
 *  servant on the network with Host information. The connection will return
 *  the IP address of 10 hosts on the network if possible.
 *
 */
class InformationConnection extends Connection
{
  private HostCache hostCache;
  
  /**
   *  Construct the connection with an existing socket
   *
   *  @param router message router
   *  @param socket socket connection to another servant
   */
  InformationConnection(Router router,
                        Socket socket,
                        ConnectionData connectionData,
                        HostCache hostCache) throws IOException
  {
    super(router, socket, connectionData);
    this.hostCache = hostCache;
  }
  
  public void run()
  {
    Host[] hosts =  hostCache.getRandomSample(10);
    
    for (int i = 0; i < hosts.length; i++)
    {
      PongMessage pong = new PongMessage(hosts[i]);
      
      try
      {
        send(pong);
      }
      catch (Exception e)
      {
        break;
      }
    }
    
    shutdown();
  }
}